linux-kernel - [PATCH 0/2] vdpa: Block vq property change in DRIVER

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Date: Mon, 25 Dec 2023 15:42:08 +0200
From: Dragos Tatulea <dtatulea@...dia.com>
To: "Michael S . Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>,
	Eugenio Perez Martin <eperezma@...hat.com>, Si-Wei Liu
	<si-wei.liu@...cle.com>, <virtualization@...ts.linux-foundation.org>, "Gal
 Pressman" <gal@...dia.com>
CC: Dragos Tatulea <dtatulea@...dia.com>, <kvm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Parav Pandit <parav@...dia.com>, Xuan Zhuo
	<xuanzhuo@...ux.alibaba.com>
Subject: [PATCH 0/2] vdpa: Block vq property change in DRIVER_OK

This series prevents the change of virtqueue address or state when a
device is in DRIVER_OK and not suspended. The virtio spec doesn't
allow changing virtqueue addresses and state in DRIVER_OK, but some devices
do support this operation when the device is suspended. The series
leaves the door open for these devices.

The series was suggested while discussing the addition of resumable
virtuque support in the mlx5_vdpa driver [0].

[0] https://lore.kernel.org/virtualization/20231219180858.120898-1-dtatulea@nvidia.com/T/#m044ddf540d98a6b025f81bffa058ca647a3d013e

Dragos Tatulea (2):
  vdpa: Track device suspended state
  vdpa: Block vq property changes in DRIVER_OK

 drivers/vhost/vdpa.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

-- 
2.43.0